package com.example.filemanager;

import java.io.File;

import android.content.Context;
import android.content.Intent;
import android.net.Uri;

public class OpenFile {
	
	Context context;
	public OpenFile(Context ctx) {
	this.context = ctx;
	}
	
	public void openFile(File file){   
	       
	    Intent intent = new Intent();   
	    intent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);   
	    //设置intent的Action属性   
	    intent.setAction(Intent.ACTION_VIEW);   
	    //获取文件file的MIME类型   
	    String type = getMIMEType(file);   
	    //设置intent的data和Type属性。   
	    intent.setDataAndType(/*uri*/Uri.fromFile(file), type);   
	    //跳转   
	    context.startActivity(intent);     
	       
	}   
	   
	/**  
	 * 根据文件后缀名获得对应的MIME类型。  
	 * @param file  
	 */   
	public String getMIMEType(File file) {   
	       
	    String type="*/*";   
	    String fName = file.getName();   
	    //获取后缀名前的分隔符"."在fName中的位置。   
	    int dotIndex = fName.lastIndexOf(".");   
	    if(dotIndex < 0){   
	        return type;   
	    }   
	    /* 获取文件的后缀名 */   
	    String end=fName.substring(dotIndex,fName.length()).toLowerCase();   
	    if(end=="")return type;   
	    //在MIME和文件类型的匹配表中找到对应的MIME类型。   
	    for(int i=0;i<MIME_MapTable.length;i++){ //MIME_MapTable??在这里你一定有疑问，这个MIME_MapTable是什么？   
	        if(end.equals(MIME_MapTable[i][0]))   
	            type = MIME_MapTable[i][1];   
	    }          
	    return type;   
	}  
	  
	  
	  
	  
	  
	  
	  
	public static final String[][] MIME_MapTable={ 
	             //{后缀名，MIME类型} 
	             {".3gp",    "video/3gpp"}, 
	             {".apk",    "application/vnd.android.package-archive"}, 
	             {".asf",    "video/x-ms-asf"}, 
	             {".avi",    "video/x-msvideo"}, 
	             {".bin",    "application/octet-stream"}, 
	             {".bmp",    "image/bmp"}, 
	             {".c",  "text/plain"}, 
	             {".class",  "application/octet-stream"}, 
	             {".conf",   "text/plain"}, 
	             {".cpp",    "text/plain"}, 
	             {".doc",    "application/msword"}, 
	             {".docx",   "application/vnd.openxmlformats-officedocument.wordprocessingml.document"}, 
	             {".xls",    "application/vnd.ms-excel"},  
	             {".xlsx",   "application/vnd.openxmlformats-officedocument.spreadsheetml.sheet"}, 
	             {".exe",    "application/octet-stream"}, 
	             {".gif",    "image/gif"}, 
	             {".gtar",   "application/x-gtar"}, 
	             {".gz", "application/x-gzip"}, 
	             {".h",  "text/plain"}, 
	             {".htm",    "text/html"}, 
	             {".html",   "text/html"}, 
	             {".jar",    "application/java-archive"}, 
	             {".java",   "text/plain"}, 
	             {".jpeg",   "image/jpeg"}, 
	             {".jpg",    "image/jpeg"}, 
	             {".js", "application/x-javascript"}, 
	             {".log",    "text/plain"}, 
	             {".m3u",    "audio/x-mpegurl"}, 
	             {".m4a",    "audio/mp4a-latm"}, 
	             {".m4b",    "audio/mp4a-latm"}, 
	             {".m4p",    "audio/mp4a-latm"}, 
	             {".m4u",    "video/vnd.mpegurl"}, 
	             {".m4v",    "video/x-m4v"},  
	             {".mov",    "video/quicktime"}, 
	             {".mp2",    "audio/x-mpeg"}, 
	             {".mp3",    "audio/x-mpeg"}, 
	             {".mp4",    "video/mp4"}, 
	             {".mpc",    "application/vnd.mpohun.certificate"},        
	             {".mpe",    "video/mpeg"},   
	             {".mpeg",   "video/mpeg"},   
	             {".mpg",    "video/mpeg"},   
	             {".mpg4",   "video/mp4"},    
	             {".mpga",   "audio/mpeg"}, 
	             {".msg",    "application/vnd.ms-outlook"}, 
	             {".ogg",    "audio/ogg"}, 
	             {".pdf",    "application/pdf"}, 
	             {".png",    "image/png"}, 
	             {".pps",    "application/vnd.ms-powerpoint"}, 
	             {".ppt",    "application/vnd.ms-powerpoint"}, 
	             {".pptx",   "application/vnd.openxmlformats-officedocument.presentationml.presentation"}, 
	             {".prop",   "text/plain"}, 
	             {".rc", "text/plain"}, 
	             {".rmvb",   "audio/x-pn-realaudio"}, 
	             {".rtf",    "application/rtf"}, 
	             {".sh", "text/plain"}, 
	             {".tar",    "application/x-tar"},    
	             {".tgz",    "application/x-compressed"},  
	             {".txt",    "text/plain"}, 
	             {".wav",    "audio/x-wav"}, 
	             {".wma",    "audio/x-ms-wma"}, 
	             {".wmv",    "audio/x-ms-wmv"}, 
	             {".wps",    "application/vnd.ms-works"}, 
	             {".xml",    "text/plain"}, 
	             {".z",  "application/x-compress"}, 
	             {".zip",    "application/x-zip-compressed"}, 
	             {"",        "*/*"}   
	         }; 
}
